Bore Tech Brass V Patch Jag, 40 Calorie/10mm Precision Machined to strict tolerances in order to work flawlessly and provide true, concentric patch contact on the barrel surface Featuring a set of 3-5 concentric contact rings, each spear point Jag securely captures patches while passing through the bore Specifically engineered contact rings provide the perfect amount of patch contact with the barrel surface which maximizes Cleaning ability Recommend For Use With OurV-StixCleaning Rods These Jags Are Properly Sized And Offer Superior Cleaning